Issues of the journals Геофизика 2011 y. issue 4

The questions connected to technology of creation of the geophysical prognosis’ maps during preparation of Russian State geological map (third generation, scale 1 : 1000000) are considered. Conditions of maintenance of reliability and quality of the technology work during the geophysical prognostic researches are determined. The special attention is given to estimation of efficiency of geological interpretation on basis of the formalized methods of geophysical data integration. Examples of the geophysical prognosis of prospective areas containing the magma chambers which connect to possible golden-silver and platinum deposits at northern and central Kamchatka are given.......

Relief тар of the crystalline basement surface of the West Siberian Platform was first constructed based on the analysis and integration of large DSS data amount obtained in West Siberia. The crystalline basement surface is shown to occur in a depth range of l to 12 km. Maximum depths are concentrated in the vast trough running submeridionally in the central platform part. In plan the trough coincides with a zone of low boundary velocities at Moho, resulted in the rupture and subsidence of consolidated crust in general. Constructed is the thickness map of Paleozoic-Riphean deposits with the highest thickness being in the northern and southern parts of the platform and in its eastern rim. The obtained data on the aystalline basement surface relief of West Siberia allowed construction the relief map for the consolidated crust of Siberia platform regions.......

We consider two different types ofphysical processes, combined in the phenomenological theory of the generic term “induced polarization ” (IP). Ln the first one (IP of “common type “) exciting electromagnetic (EM) field is converted into another extraneous of the EM field (electrochemical, electrokinetic, concentration - diffusion, elastic, etc.) which, in turn, after the “shutdown ” of the exciting field is transformed back into an electromagnetic. In the phenomenological theory to describe such a process is introduced extraneous current. In the second case, the IP is a transitional process, which occurs in singlephase, but inhomogeneous in conductivity and permittivity of the medium (IP of Maxwell - Wagner type). This process can be described, while remaining completely within electrodynamics. The question whether it is possible in both cases to adequately describe the phenomenon of the IP with “apparent” frequency dispersion of electrical conductivity of the medium......

We have constructive complex interpretation algorithm using gravity and magnetovariation data. Applying technology has been developedfor constructing density distributions in curve-edged layers we have solved the inverse problem for the gravitational data of the part of west area of Predurals depression. The linear inverse gravity problem about fining the variable density in layer is solved and sites of the towered density are revealed. The system of the linear algebraic equations of the big dimension arising thus with help of the parallel iteration method is solved on the massively parallel computing system MVS-1000 and analysis of the speed up and efficiency of the parallel algorithm with different number of processors is carried out. Earth’s crust high porosity zones have been restored, which spatially coincide with areas of high variations of a century course of a geomagnetic field.......